code: def test_tight_pcolorfast():
      fig, ax = plt.subplots()
      ax.pcolorfast(np.arange(4).reshape((2, 2)))
      ax.set(ylim=(0, 0.1))
      buf = BytesIO()
      fig.savefig(buf, bbox_inches="tight")
      buf.seek(0)
      height, width, _ = plt.imread(buf).shape
      # Previously, the bbox would include the area of the image clipped out by
      # the axes, resulting in a very tall image given the y limits of (0, 0.1).
      assert width > height
  
file_path: matplotlib/lib/matplotlib/tests/test_bbox_tight.py
imports: from io import BytesIO
  import numpy
  from matplotlib.testing.decorators import image_comparison
  import matplotlib.pyplot
  import matplotlib.path
  import matplotlib.patches
  from matplotlib.ticker import FuncFormatter
label_desc: Use image node_id 9 for calling a global function with example usage: test_tight_pcolorfast() without return types